Air gauge



FIG. 1 is an elevational view of a preferred embodiment of the air gauge of the present invention;

FIG. 2 is a front view thereof, the rear view being identical;

FIG. 3 is a right side view thereof the left side being identical;

FIG. 4 is a top view thereof;

FIG. 5 is an elevational view taken substantially along circle 5 in FIG. 1 and enlarged for clarity;

FIG. 6 is a view taken along circle 6 in FIG. 2 and enlarged for clarity; and,

FIG. 7 is a view taken along circle 7 in FIG. 3 and enlarged for clarity. 

The ornamental design for an air gauge, as shown and described. 